Using the Two-way composite loading experimental device, the bearing performance of post-grouting drilled shaft under lateral and axial load is studied by full-scale field test. The result of this research reveals that the lateral critical load Hcr and lateral ultimate load Hu are improved when the axial load is applied to post-grouting drilled shaft, the settlement of post-grouting drilled shaft and not grouting drilled shaft increase while the axial load is close to ultimate load, because the settlement of a foundation pile has a relationship with the size of axial load on the top of pile in the damage process of drilled shaft under lateral load, as well as the variation of vertical settlement of normal drilled shaft is more than that of post-grouting drilled shaft, since the non-grouting drilled shaft is more sensitive to the lateral load than the post-grouting drilled shaft.

The Static load test of the post-grouting filling pile in Zhengzhou city’s third ring road rapidness project, uses strain gauge and distributed optical fiber to track and monitor the evolution rule of load-settlement, pile body stress, pile side resistance, etc., interprets bearing properties of large diameter post-grouting filling pile, contrasts and analyzes the monitoring data obtained by optical fiber and strain gauge at the same time. The result shows that, the monitoring effect of the pile body stress obtained by distributed optical fiber technology is superior to the strain gauge, but the data of them still needs to verify each other.